Centrifugal bolt



(No Model.)

R. SGHULZE..

CENTRIFUGAL BOLT.

Patented Mar. 18, 1890. A FIC-Jil.

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UNITED STATES PATENT OFFICE.

ROBERT SCI-IULZE, OF COVINGTON, KENTUCKY.

CENTRIFUGAL BOLT.'

SPECIFICATION forming part of Letters Patent No. 423,635, dated March 18, 1890. Application filed August 16, 1889. Serial No. 320,965. (No model.)

of Kentucky, have invented certain new and useful Improvements in Centrifugal, Bolts, of which the following is a specification.

My invention relates to that class of milling-machines known as centrifugal bolts.

The objects andk features of my invention will fully appear from the following description of the accompanying drawings,in which like -parts are indicated by similar referenceletters wherever they occur throughout the various views, and in which-.- s

Figure 1 is a view in longitudinal section of a bolt embodying myimprovements. Some of the parts are shown in elevation, and some parts are broken out to expose the parts back of them. Fig. 2 is a transverse vertical section taken through line .fr of Fig. l. Fig. 3 is a fragmentary section of the appliances for holding the ends of the bolting-cloth and stretching the same. Fig. 4 is a fragmentary View, in elevation, of the rear wall of the chest.

. Fig. 5 is a similar view of that portion of the chest to which the air-inlet valve is secured. The outer casing A may be of theusual form, the lower portion being inclined, as usual, to discharge into the ordinary conveyer. (Not shown.) Across each end of the chest is a bridgetree A to support the bearings b, in which the flier-shaft B is supported.

VUpon the flier-shaft, near each end of the chest, is secured a wheel C. These wheels have outwardly-projecting inclined bracketarms c, to which are secured the blades C.

The arms c of the opposite wheels C are so arranged that the blades when secured in place are spirally inclined, as shown, so as to carry the stock under treatment from the head toward the tail of the machine.

The liier composed of the shaft B,its wheels C c, and the blades C revolves within a bolting-chamber composed of the sheet-metal segmental sheel D and the bolting-cloth E. The sheet-metal shell, which extends from end to end of the chest, sheathes part of the back and top of the chest and curves around atthe bottom in the arc of about one-quarter of a circle, its lower end being secured upon the tion of heads G around which the boltingcloth E passes is rabbeted at g to receive segmental cleats which press and hold the bolting-cloth in place, and they are also provided with V-shaped grooves at g for the purpose f of receiving the beveled edges ofthe segments J for the'purpose of stretching the bolting-cloth from end to end, which is accomplished as follows:

K Kare segments held upon each end of the bolting-chest by buttons le. The segments .l J are adjustably secured to the segments K by set-screws and thumb-nuts j.

The bolting-cloth E has at each end loops formed by turning over the edges. Small segmental fastening-cleats, vwhich may be of wire, either square or round in cross-section, are then passed through theseploops, forced into the rabbets g, formed in end pieces G, and held in 'place by the segments K and buttons le. The segments J are then forced inward to give the cloth the requisite tension and secured in place by the lthumb-nuts and set-screwsj. The longitudinal edges of the bolting-cloth are also formed into loops and are held in the-bars L L. Each of these bars is longitudinally perforated and slotted from the edge into the perforation. The opposite longitudinal edge of the bolting-cloth is passed through these slots into the enlarged perforations, and wires passed through the loops of 'the cloth `to fasten its edges to these bars L L. The lower one of these bars L is held rigidly in place against the longitudinal board or partition F by a bar F', upon the upper edge of which the bar L rests and the buttons j", which are secured upon the bar F by screws. The opposite bar L, with the edge of the bolt-ing-cloth secured in it, rests upon the horizontal partition H, and is held in place ICO ' lars M have levers or handles m2, by which they are turned, and also pins m8, which strike against pins mt,'projecting from the washers m', and stop the further rotation vof the eccentric collars when the lowestA point of its cam-surface' is just above the bar L. The looking-cloth is tightened by forcing the bar Linward in the direction of the partition M then clampiugit down by means of the eccentrics M, which are held from turning by thethumb-nuts m5 after the bar L has been clamped in the proper position.

N and N are strips extending longitudi? nally of the chest, to the lower edges of which is secured the segmentalp'late N2, which isV con-centric with the flier, the trips N N and segmental plate N2 forming a triangular partition extending from end to end of the chest. In the upper rear corner of the chest are two strips or bafe-plates N3 N4, which also extend from end to end of the chest.

O are blades, of which there may be any desired number, arranged at regular distances apart. These are secured upon rock-shafts o, vwhich extend out from the back of the chest and are provided with crank-arms 0.', the lower ends of which are connected to a bar o2,whereby the cranks and rock-shafts are simultaneously moved to give the blades O any desired inclination, either to retard or advance the stock under treatment. One of the arms o or the bar o2 is provided with a set-screw o3, which enters one of several perforations in the back wall of the chest to retain the blades O in the posit-ion desired.

P is thespout through which the stock is fed tothe machine; Q, the discharge-spout v for the bran and light material, which is blown to the top of the chest by the iiiers, and R is the discharge-spout for the heavy stock,which is too coarse to pass through the bolting-cloth. S is a valve at the head of the machine to regulate the amount of air admitted to the chest, and G, Fig. l, is a light metal hoop or band of the same shape in edge elevation as the part of the ends G, around which the bolting-cloth is stretched.` The purpose of this band is to hold the center of the bolting-cloth out so that it will not be struck bythe edges of the Hier-blades when the machine is in op eration.

The operation of my machine is as follows: The stock is fed to the machine through the feed-spout P, (within or above which any suitable feed appliances may be'located,) and being caught-by the Hier-blades C is thrown by centrifugal force outward. A current of air induced by the blades enters through the valve S and carries the lighter portions up toward the top of the chest and out through the spout Q at the tail of the bolt. The heavier parts of thestock are deiiected by the baiiie-plates N N N2 N3 N4 and the board 'I and again brought under the action of the flier-blades C and thrown outward with considerable force against bolting-cloth, through which the separated stock passes and is carried down to the conveyer-boxes. The heavier stu which is rejected by the bolting-cloth is carried to the tail of the machine and discharged through" the trailing-spout R. If it is found that the dust discharged through spout Q contains some iiour or stock that should pass through the bolting-cloth, the supply of air admitted through the valve S is reduced 'by partially closing the valve. If the stock is being carried too rapidly to the tail of the machine, it is retarded by turning the blade O from the perpendicular, as indicated in dotted Kline, Fig.

1. The movement of the stock is accelerated by turning the blades in the opposite direction. The same result will also be accomplished by changing the incline of the blades C', which may be accomplished by loosening the -setscrew which holds one of the wheels C upon the shaft Band turning it partially around. The bolting-cloth need not be stretched so tight as on the ordinary cylindrical reel, as it is desirable that it should vibrate by the force of the stock thrown against it. This vibratory motion keeps the meshes free and obviates the necessity of brushing or otherwise cleaning it. r K

It will be seen that the machine requires much less bolting-cloth than those in common use. quire attention or cause fricton, and therefore requires less power to run it, and I have found that a small machine made as above described will iinish more stock than a much larger one made after the most approved patterns now in use.

The plates or partitions N N N 2 N3 N4 serve in separating the stock; but the machine would be effective without either or all of them, but the bolting-cloth would be subject ed to heavier duty.

It is obvious that other Wel1-known fliers may be employed with my reel, but not with the same advantage.

.I claim- 1. In a centrifugal bolt, the combination of the chest A, the bolting-concave consisting of the headsG, secured to each end of the chest, the sheet-metal segmental shell D, and the bolting-cloth' E, the partition F, to support the end of shell D, and the fliersmounted to revolve within said concave and vhaving spirally-inclined blades C', substantially a-s hereinbefore set forth.

2. The combination, substantiallyas specifled, of the bolting-chest, the heads G, secured to the ends thereof, the sheet-metal shell D, bent around the rear portion of said heads, the plates H I, extending lengthwise of the chestand secured upon said heads, the longitudinal partition F, upon which the lower edge of the shell D rests, thel bolting-cloth stretched around said heads from the edge of shell D to the plates I-I, and means, such as shown, to stretch and hold the bolting-cloth IIO in place, the hoop-segment G', to support the bolting-cloth at its center, and the flier having spirally-inclined blades arranged to revolve wit-hin the reel formed by the sheet-metal shell and bolting-cloth, for the purpose set forth. Y

3. The combination of the chestA, having` air-valve S at the head and dust-discharge leading from the top at tail end, the heads G, the triangular partition formed by the plates N N N2, the sheet-metal shell D and boltingcloth E, the partitions H, I, and F, means for holding and stretching the bolting-cloth, the central support G', for the bolting-cloth, the flier-shaft B, Wheels C, having inclined arms c, and the spirally-arranged flier-blades C', constructed and arranged to operate ksubstantially as specified.

4.- In a centrifugal bolt, the combination of the chest, the reel consisting of the heads G,

said reel, substantially as shown and de-` scribed. v

5. In a centrifugal bolt, the combination of the chest, the reelheads G, having grooves and rabbets, the partitions H M', the boltingcloth E, the bars L L', to which the edges of the bolting-cloth are secured, the segments J K, buttons k, and thumbnuts j, for stretching the cloth endwise the bar L, and eccentric M, for stretching it around the heads, and hoop G', substantially as specified.

. RQBERT SCHULZE. Witnesses: l

FRANK L. MILLWARD', l GEO. J. MURRAY. 

